This is an important problem. Please______.

.. Department of Homeland Security and CIAproduced ______ joint report on Monday warning that ______ next 911 could infact occur on ______ different date.

Must I return the book today I haven’t finished it.—It depends on how long you have ____________ it You should return it two weeks.

If you want to book tickets for the 2012 Olympic Games, just call 00952012. It ______ be simpler.

1Mr. Green ___ to themanager now. You’d better call him later.